Kirk Hillman wrote:
I have heard that one shouldn't need more than 100:1. Remember that the
lower the gearing, the more torque to the wheels, and we all know how
Rovers like breaking half shafts. At least I do ;)
> Now comes the debate about how low is too low. What's the answer?
> There isn't one definitive solution. If you wanted to restart an accent on
> a steep and muddy slope there are some agricultural Unimogs that are
> unmatched at around 500:1. For most uses though it's so slow you can't tell
> if you are moving or not. Other times it's not good enough because the
> traction simply isn't there. In low range now I never use 4th and hardly
> ever 3rd, because I might as well be in high. Logically there seems to be a
> good argument to say the best arrangement would be to have the low range low
> enough to be a continuation (numerically) down from 1st in high range, i.e.
> when 1st high isn't low enough the next step is 4th low. Having the early
> t-case and later transmission is closer but still not there. Since 1st high
> is about 16:1, I think 4th low should be about 20:1, 3rd 30:1, 2nd 45:1 and
> finally 68:1.
> There have been many, many more knowledgeable off-roaders than I who
> have sort of picked 80:1 as the magic number. Much lower than that and it's
> useless in all but the most extreme cases. But to get this all to work out
> (assuming SIII gearbox and 4.7 R&P) I would need a low range of about 4.25.
> The other option is simply to use a granny gear transmission. Boom, low
> gearing without changing the t-case. These gearboxes make me wonder how
> much I really need that nice, tightly and evenly spaced gearing I'm used to.
> Oh, heck, why not dream of the granny NV4500 with the LT230?
> 100:1 off road and 100 kph at a mere 2688 RPM!!! (Theoretically)
>
-- Jim Hall 1966 88" Elephant Chaser http://webs.purplemountain.net/jimfoo/Foospage.htm "You know, I never really damaged my Rover 'till I started wheeling with Jim." Mitch Stockdale _______________________________________________ LRO mailing list LRO@land-rover.team.net http://land-rover.team.net/mailman/listinfo/lro
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